9d39a @ "magically good" cable - no ext pwr

cat libusb%device@9%17_serial@9d39ad51b7873293c26c7883b487d5b1_1424343309.log | brat_analyze_td
  1 1424343310 RX 1428   OK 385
  1 1424343695 TX 1428   OK 1145
  2 1424344840 RX 1428   OK 384
  2 1424345224 TX 1428   OK 1146
  3 1424346370 RX 1428   OK 384
  3 1424346754 TX 1428   OK 1146
  4 1424347900 RX 1428   OK 385
  4 1424348285 TX 1428   OK 1143
  5 1424349428 RX 1428   OK 384
  5 1424349812 TX 1428   OK 1144
  6 1424350956 RX 1428   OK 384
  6 1424351340 TX 1428   OK  ??